The need for increased use of renewable resources put quite some attention to liquefaction of biomass, including wood. Several possible applications of liquefied wood as an alternative to petroleum based derivatives have been considered in recent years. In this paper, possibilities of wood liquefaction to manage post-consumed CCB (copper, chromium, boron) containing wood are considered, with a focus on investigations of fungicidal properties of liquefied wood with and without CCB. It was found out that liquefied CCB containing poplar and spruce wood did not exhibit sufficient protective efficacy against the following fungi: Trametes versicolor, Hypoxylon fragiforme, Gloeophyllum trabeum and Antrodia vaillantii. It is also believed that turning of liquefied wood with CCB into another products, such as adhesives, coatings or plastics, to extend service life of wood that had been protected by CCB, is most likely not an attractive solution. However, liquefaction could be interesting as the first step in detoxification of spent CCB (copper, chromium, boron) treated wood.

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